#include <iostream>
#include <math.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>

using namespace std;

int main()
{
int a;

  cout << "Vvedi kollichestvo zadaniy: ";
  cin >> a;
  switch (a)
  {
  case 10:
    cout << "des'at' zadaniy";
      break;
  case 11:
    cout << "odinnatsat' zadaniy";
      break;
  case 12:
    cout << "dvenatsat' zadaniy";
      break;
  case 13:
    cout << "trinatsat' zadaniy";
      break;
  case 14:
    cout << "chetyrnatsat' zadaniy";
      break;
  case 15:
    cout << "pyatnatsat' zadaniy";
      break;
  case 16:
    cout << "shestnatsat' zadaniy";
      break;
  case 17:
    cout << "semnatsat' zadaniy";
      break;
  case 18:
    cout << "vosemnatsat' zadaniy";
      break;
  case 19:
    cout << "devyatnatsat' zadaniy";
      break;
  case 20:
    cout << "dvatsat' zadaniy";
      break;
  case 21:
    cout << "dvatsat' odno zadanie";
      break;
  case 22:
    cout << "dvatsat' dva zadaniya";
      break;
  case 23:
    cout << "dvatsat' tri zadaniya";
      break;
  case 24:
    cout << "dvatsat' chetyre zadaniya";
      break;
  case 25:
    cout << "dvatsat' p'at' zadaniy";
      break;
  case 26:
    cout << "dvatsat' shest zadaniy";
      break;
  case 27:
    cout << "dvatsat' sem' zadaniy";
      break;
  case 28:
    cout << "dvatsat' vosem' zadaniy";
      break;
  case 29:
    cout << "dvatsat' dev'at' zadaniy";
      break;
  case 30:
    cout << "tritsat' zadaniy";
      break;
  case 31:
    cout << "tritsat' odno zadanie";
      break;
  case 32:
    cout << "tritsat' dva zadaniya";
      break;
  case 33:
    cout << "tritsat' tri zadaniya";
      break;
  case 34:
    cout << "tritsat' chetyre zadaniya";
      break;
  case 35:
    cout << "tritsat' p'at' zadaniy";
      break;
  case 36:
    cout << "tritsat' shest' zadaniy";
      break;
  case 37:
    cout << "tritsat' sem' zadaniy";
      break;
  case 38:
    cout << "tritsat' vosem' zadaniy";
      break;
  case 39:
    cout << "tritsat' dev'at' zadaniy";
      break;
  case 40:
    cout << "sorok zadaniy";
      break;
  }
    return 0;
}
